The invention relates to a data-driven 
urban bus line 
health diagnosis method, belonging to the field of intelligent 
transportation technology. Through the data-driven, the 
urban bus line 
health diagnosis method is established. The method comprises (1) 
data acquisition (2) data preprocessing (3) evaluation of 
bus line 
health index (4) construction of 
bus line service 
knowledge base (5) cause diagnosis of unhealthy lines. At the same time, considering the passenger service and operation cost, the technical scheme establishes the evaluation method of 
bus line health indexes, through massive datamining, establishes the relationship between the individual and comprehensive 
health index and the objective elements of the line, road, intersection, passenger and other related to the line operation, and constructs the 
knowledge base of bus line service. Based on the 
knowledge base, the unhealthy line can be diagnosed. If the diagnosis fails, the expert diagnostic method can be further used. Atthe same time, the knowledge base can be updated to form a 
closed loop, which can self-improve the line 
health index evaluation and 
health diagnosis process.